BYU snags a No. 1 seed

In this bracket, the East matches up with the West, the Southeast with the Southwest in the national semifinals.

This week's notable moves:

 Ohio State is the new No. 1 overall seed.

 BYU is a new 1-seed.

 Florida got squeezed and dropped from the last No. 3 seed to the first 5 because of the good work of teams just behind it.

 The Southwest features a rematch between Xavier and Butler -- something the committee attempts to avoid -- but that was the best solution to a bunch of seeding, conference and other rematch conflicts.

 Coastal Carolina was moved from a 15 to a 16 because of personnel losses.

With the addition of three at-large spots (increasing the field to 68 teams), there are now four play-in games, dubbed the "First Four." Two games will match the tournament's lowest seeds, Nos. 65 through 68, with the winners claiming a No. 16 seed. The other two games will feature the last four teams of the 37 at-large qualifiers, with the winners likely receiving No. 11 or 12 seeds.

The top-four seeds in each region, starting with the No. 1 seeds, receive geographic preference when possible. An imbalance in high seeds between regions (e.g. if more than two top-four seeds are closest to the same subregional location) may force a protected seed into a secondary location.

League winners (automatic qualifiers) are listed with their conference for clarity. Auto-bid winners in traditional one-bid leagues are determined by the best RPI from the team(s) with the fewest league losses. Teams can be moved a seed line up or down to conform to bracketing rules.